一个C语言源程序中如果调用了函数fabs，那必须有编译预处理命令（ ）。
A:
B: include <stdio.h>
C:
D: include <math.h>
E:
F: include <ctype.h>
G:
H: include <stdlib.h>
A:
B: include <stdio.h>
C:
D: include <math.h>
E:
F: include <ctype.h>
G:
H: include <stdlib.h>
举一反三
- 使用scanf()函数时，在源程序开头必须写预处理命令（ ） A: B: include <stdio.h> C: D: include <stdio > E: include <stdio.h> F: G: include <scanf.h>
- 在JSP中可动态导入其他页面的标签是（ ） A: <%include/></textarea> B: <%@include%> C: <jsp:importPage/> D: <jsp:include/>
- 使用scanf函数需要在头文件中添加___. A: B: include <stdio.h> C: D: include <ctype.h> E: F: include <float.h> G: include <iomanip.h>
- 在当前页面中包含a.htm的正确语句是（ ） A: <%@ include=”a.htm”%> B: <jsp:include file=”a.htm”/> C: <%@ include page=”a.htm”%> D: <%@ include file=”a.htm”%>
- 设置表格边框色彩的亮度的HTML代码是（)。 A: <thbordercolorlight= B: > C: <tablebordercolor= D: > E: <thbordercolor= F: > G: <tablebordercolorlight= H: >